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  Mains monitoring relay  (38,713 offers of 6,230,546 product items)

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Sensata Cynergy3 RSF40 Series Horizontal Internal Polyphenylene Sulfide Float Switch, Float, 500mm Cable, SPNO, 240V ac / 2891319 (2 offers) 
Suitable for signal switching and for use with transistorised input/low power, suppressed coil miniature relays. Not suited for any inductive or inrush (e.g. filament lamps) loads. Cynergy3 Horizon...
Sensata / Cynergy3
RSF46Y050TG
£ 26.109*
per piece
 
 piece
Siemens 10 A SIRIUS 3RV Motor Protection Circuit Breaker, 230 V / 2164832 (1 offer) 
The Siemens Circuit breaker size S00 for system protection with approval circuit breaker UL 489, CSA C22.2 No.5-02 A-release 10 A N release 130 A screw terminal Standard switching capacity Circuit ...
Siemens
3RV2711-1JD10
£ 158.328*
per piece
 
 piece
Siemens 3RF2 Series Solid State Relay, 600 V Load / 2114919 (2 offers) 
The Siemens has 3RF2 semiconductor relay with 1 phase. This semiconductor relay has zero-point switching. This relay has mounting type screw fixing. This semiconductor relay has screw terminal.IP d...
Siemens
3RF2120-1AA45
£ 38.23*
per piece
 
 piece
Sensata Cynergy3 RSF40 Series Horizontal Nylon Float Switch, Float, 500mm Cable, NO/NC, 240V ac Max, 120V dc Max / 339730 (2 offers) 
Suitable for signal switching and for use with transistorised input/low power, suppressed coil miniature relays. Not suited for any inductive or inrush (e.g. filament lamps) loads. Cynergy3 Horizon...
Sensata / Cynergy3
RSF43Y050QF
£ 27.75*
per piece
 
 piece
Siemens 16 A SIRIUS 3RV Motor Protection Circuit Breaker, 230 V / 2101595 (1 offer) 
The Siemens Circuit breaker size S0 for system protection without phase failure protection A-release 10..16 A N-release 208 A screw terminal Standard switching capacity Circuit breaker SIRIUS 3RV2 ...
Siemens
3RV2021-4AA10-0DA0
£ 106.028*
per piece
 
 piece
Sensata Cynergy3 Panel Mount Reed Relay, 12V dc Coil, SPST, 7000V Max, 2 A Max, 150Ω / 1892488 (1 offer) 
Very high isolation voltages (up to 10kV) are achieved through the use of high vacuum reed switches with either Rhodium or Tungsten contacts and make these relays suitable for high reliability appl...
Sensata / Cynergy3
DAT71275PU
£ 55.959*
per piece
 
 piece
Siemens 3RF2 Series Solid State Relay, 70 A Load, DIN Rail Mount, 460 V ac Load, 24 V dc Control / 5187641 (1 offer) 
3RF23 Series. Complete unit comprising solid state relay and optimised heat sink IP20 rating Optimised heat transfer by DCB technology Efficient thyristors with high reverse voltage Screw connectio...
Siemens
3RF2370-1BA04
£ 152.139*
per piece
 
 piece
Sensata Cynergy3 RSF66P Series Vertical Polyphenylene Sulfide Float Switch, Float, NO/NC, 240V ac Max, 120V dc Max / 7564242 (2 offers) 
Cynergy3 Float SwitchThe Cynergy3 RSF66P series float switch is a vertical mount type and has NO/NC output configuration. This float switch has a polyphenylene sulphide body. The switch has an uppe...
Sensata / Cynergy3
RSF66A25B175P
£ 51.678*
per piece
 
 piece
Siemens 2.5 A SIRIUS 3RV Motor Protection Circuit Breaker, 230 V / 2101597 (1 offer) 
The Siemens Circuit breaker size S00 for transformer protection A-release 1.8..2.5 A N release 52 A Spring-type terminal Standard switching capacity Circuit breaker SIRIUS 3RV2 For transformer prot...
Siemens
3RV2411-1CA20
£ 74.914*
per piece
 
 piece
Sensata Cynergy3 Panel Mount Reed Relay, 24V dc Coil, 1000V Max, 3 A Max, 925Ω / 1892457 (1 offer) 
Very high isolation voltages (up to 10kV) are achieved through the use of high vacuum reed switches with Tungsten or Rhodium contacts and make these relays suitable for high reliability application...
Sensata / Cynergy3
DBR72405PU
£ 50.695*
per piece
 
 piece
Siemens 3RF2 Series Solid State Relay, 70 A Load, Screw Fitting, 600 V Load / 2104403 (1 offer) 
The Siemens solid-state contactor device are non-wearing and silent and are therefore ideal for noise-sensitive areas (offices, hospitals). They are also extremely reliable at high switching freque...
Siemens
3RF2370-3AA06
£ 172.939*
per piece
 
 piece
Sensata Cynergy3 RSF70 Series Horizontal External Nylon Float Switch, Float, 1m Cable, SPNO, 240V ac Max, 120V dc Max / 3389722 (3 offers) 
Suitable for signal switching and for use with transistorised input/low power, suppressed coil miniature relays. Not suited for any inductive or inrush (e.g. filament lamps) loads. Cynergy3 Horizon...
Sensata / Cynergy3
RSF73Y100RN
£ 22.14*
per piece
 
 piece
Siemens 2.5 A SIRIUS 3RV Motor Protection Circuit Breaker, 690 V / 2176953 (2 offers) 
The Siemens SIRIUS 3RV2 circuit breaker for motor protection shuts down safe in the event of a short circuit and protection of the loads and system against overload, as well as for safe separation ...
Siemens
3RV2111-1CA10
£ 73.05*
per piece
 
 piece
Sensata Cynergy3 Panel Mount Reed Relay, 24V dc Coil, 7000V Max, 2 A Max, 925Ω / 1892390 (1 offer) 
Very high isolation voltages (up to 10kV) are achieved through the use of high vacuum reed switches with Tungsten or Rhodium contacts and make these relays suitable for high reliability application...
Sensata / Cynergy3
DBT72475PU
£ 66.881*
per piece
 
 piece
Siemens 3RF2 Series Solid State Relay, Screw Fitting, 230 V Load / 2114913 (2 offers) 
The Siemens has 3RF2 semiconductor relay with 1 phase. This semiconductor relay has zero-point switching. This relay has mounting type screw fixing. This semiconductor relay has screw terminal.IP d...
Siemens
3RF2030-1AA42
£ 34.82*
per piece
 
 piece
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